How to exclude Vendors into a Responsibility

In Payables, we wish to create two new responsibilities, one which can view external Vendors(Suppliers) only and the other responsibility that which only perform operations on Employees.  Is there a system profile that can be used for this, or an option somewhere?
If the above is not possible without customisation then, is a way to disable prevent employee address and bank accounts details from being displayed when viewing Suppliers in Payables?

Thanks
Jayesh